Improvement in rotary pumps



Catntt (tinte WILLIAM D. ANDREWS, OF BROOKIIAVEN, NEW YORK.

Letters Patent No. 110,330, dated December 20, 1870.

IMPROVEMENT lN ROTARY PUMPS.

The Schedule referred to in these 'Letters Patent and making prt of thesanne.

To all whom lit may concern Be it known that I, WILLIAM D. Axnnnws, ofBrookhaven, in the county of Suffolk and State of New York,have'invcnted certain new and useful Iniprovemcnts in Iumps; of whichthe following is a petuspnmp, which carries and discharges water orother fluids through impetus given to it by rapid mo-v tion, asdistinguished from pumps which act by pressnre through meansoftight-worhing pistons andjoints. Said invention comprises a casehaving an annular recess ofcqual diameter at each cud, and a propellingwheel arranged to vrevolve free fromcontact therein, said case beingprovided with induction and eduction passages in communication withthe,annular recess, through openings in the -periphery otf`-the case,the centers of which passages are in the plane of motion of the centerof the wheel. Y The invention likewise comprises, in combination. withsaid case, apropelling wheel, constructed to sweep the recess in thecase by wings radiating from a central hub and supported by a centralflange extending Y from the hub to their peripherics, said wingsextending-either entirely across the hub in a right line, or only fromthe-central flange to one end of the hub, and alternately uponcithcrside thereof, the wing upon one side being oppositcthe center ofthe space between two wings upon the other side of the flange.

'Ihe invent-ion also includes a combination of a movlable head to thecase, and attached Abearings for the ln'opelling-whcel shaft, wherebysaid wheel with its shaft and bearings may be removed withoutdist-urbing tlic case or its attached pipes, .the truth of the hearingsis prcscryed, and increased facilities areat'- fordcd ioradjustmcnt orrepair; likc,wise provision is secured, bythe turningr of the head withits attachments, for varying the direction of the driving-belt free fromstrain, operating to produce objectionable spring ot the parts, andadmitting otl thc removal of the belt without cutting it.

The invention likewise enibraecs an adj ust-able bearing-box, incombination with a grooved bearing for the propelling-wheel shalt,whereby increased facility is' afforded i'or the removal of the shaftfrom its box, andI withdrawal of the latter from the head of the pumpoi' arni connected with said head.

1-` Vurthermore, the invention comprises a boss or ring for securing thepump in position, said boss or ring being concentric with thedriving-shaft, and whereby provision is made for turning the pumpentirely around. upon the ring to suit different direct-ions as regardsattachment ofthe induction and cduction-pipes which connect with thepump.

In the accompanying drawing- A represents the conduct-ing case, formedwith a circular recess, B, in its center, closed at one end, but open atthe other, and of a diameter suflicient to allow of the propelling wheelC and its wings b b revolving therein wit-hout touching. This recess Bis left open at its one end for the insertion of the propelling wheel C,and is closed by an independent movable head, D, which is secured bybolts c to the tlange E of the case, and has connected or cast in onepiece with ita st'uiiing-box, F, and an arm, G. s

An outside bearing-box, 1I, is att-ached to said arm by bolts m passingthrough slotted holes'n, which permit of the adjustment ot' thepropelling wheel within' the case, and which box, in connection with thestufiing-box F, supports the,propelling-wheel shaft I, that thus has nodirect connection with the case A, so that said shaft and wheel may beremoved together with the head D and boxes 11 and 1I, without disturbingthe case or its attached pipes. By this connection of thepropelling-wheel shaft and its bearings with the yindependent movablehead D, that is attached only to the pump by the flange E, all dangerot' throwing the bearings out of line with each other bythe springing ofthe pump, pipes, or foul'ldation is avoided, and a ready means securedfor taking the wheel from the case-for alterations, adjustment,or-repairs, to do which requires only the removal ofthe bolts efrom theflange E.

'lhis arrangement also permits of the turning of the head D, and with itthe arm G and bearilg-box l-I about the shaft I as a center.. ot'motion, and independent-ly of thc pun1pcase, the screw-bolts c beingwithdrawn from one set of holes and inserted in another to suit, so thatin whatever direction the driving-belt is carried around the pulley J itmay be made to embrace the arm Gr, bringing the stra-inthereupon in thebest direction to prevent its springing, and perniitting removal of thebelt from the pulley and pump `without cutting it or displacement of thebearing-box II, Aas would be necessary if the belt were passed aroundthe pulleyJ from the opposite direction to that shown, and between saidpulley and the arm G.

'Ihc arm G is in the form ot' a segment of a circle, for purposeshereinafter specified.

.'Ihe outer bearingbox ll has one or more ridges-or' grooves d, whichtit corresponding grooves or ridges in the surface of the driving-shaft,to prevent any end movement thereof. Suid box II or standard whichcarries it, has a curved foot, or base, K, struck, as regards its outersurface, from the center of the shaft I, andv made to tit the conca-vesurface of the arm G, within or on which it is adjustably secured, ashereinbefore described, by bolts m passing through slots a, and wherebythc propelling wheel may be set out ot cv ntact with the end of the caseand of thehcad D.

rlhe object of making the arm and foot of the bearing-box circular is toallow of the removal of the shaft from said boK and permit itsAwithdrawal from the head, which is done by turning thc box upside down,using the shaft as a center to revolve it upon, and removing the cap,when the box can be released, which, l

owing to the groovcd clip of the box on the shaft, could not be donewithout this or a similar provision.

The distance between the stationary head and movable-head D of therecess B is just sufficient to allow the propelling wheel to revolvebetween them without touching.

R .is the induction, and It' the eduction passages for the admission anddelivery of water to and from the case and wheel. rlhese passages are inline with each other, at right angles to thc driving shaft I, and aresimilar, the one to the other, so that their uses may be transposed byreversing the motion of the wheel. Said passages arc circular in theircross-sections, at their openings e c', but are gradually changed inform as they approach the wheel, Imtintaining, as nearly as may be, thesame. area of cross-scction throughout, until where theyenter andconnect with the recess B they become oblong squares, having a breadthequal to that of the propelling wings, and a depth sntlicient ltomaintain a proper area of crosssection. 'lhese passages may be maderound, a continuation of and the 'same size as the openings e c', butare changed in shape for the reason that the tendency of the water, whenin contact with the wings in motion, isto move at right angles to theirfaces, and the tirst motion of the water, when met by each successivewing at the point of entrance to the recess, is partially across theincoming column, and the farther the inside of the passage is removedfrom the center of the wheels motion the nearer will such ihotioncoincide with that of the body of the moving column. v

l'hc same result in the opposite direction is effected in the eduction,and the necessary deflection of the water from a straight line inconsequence ofthe changing of the position of the faces of the wings, byreason of their rotary motion, is thereby reduced.

A similar result ensues from an enlargement of the diameter of thewheel, but at anincreased cost of coustruction.

lhe passages It lt may b e made to-open into the recess B at pointseither nearer together or fart-her separated from each other than ishere shown, the re.

sult being, if placed farther apart, a greater deflection of. the waterfrom a straight line in passing through thc pump, causingincreasedfriction, which is to some extent compensated for by thc greaterquantity of water acted upon at one timc,\\'hicl 1 reduces the speednecessary to bc given to the wheel to produce a given result. If placednearer together less water is acted upon, a straighter course ismaintained, decreasing the friction, but requiring a more rapid motionofthe wheel to produce a given result.

L is a supporting standard, with a foot M for scouring the pump to apost, floor, or other foundation. This standard is ofan annular orrecessed construction, to receive within it a boss or ring, N, of thepumpcasc A, concentric with the shaft l, and by which said case, throughmeans of set-screws f, is secured to the standard. This arrangementpermits of the pump being turned entirely around upon the boss N, as acenter, and of being secured at any point ofthe circle by theset-screwsf, to accommodate the direction of 'the attached .inductionand eduction-pipes as may be required. The boss and recessed portioninto which it ts may be secured, the one to the other, by keys, wedges,or other devices accomplishing the same rcsult as the set-screws f.

The propelling wheel G is of a form to sweep the recess B, having wings,bb', which radiate irom a ccntral hub, h, and which are supported by acentral flange, i, extending from thc hub to the peripheries or outerextremities of thc wings. These wings may extend entirely across the hubin right lines, or only from the central flange t' to the end of thehub, and alternately upon either side, as shown in the drawing, whereinthc wings upon one side of the flange are arranged to lie opposite the'centers of the spaces bctween vthe wings on the other side thereof. Thissccurcs a more continuous or steady discharge from the pump.

Operation'.

The pump being first filled with water, rapid motion is communicated 'tothe propelling wheel G in the direction of the arrows, and the tendencyof the water, when in motion, being to lcavc the wheel in lines at rightangles to the faces of the wings, and the' only opening from thc recessby whichl it can escape on such line being bylthe cducl'ion passage R,the contents of the wheel are forced into said passage, creating avacuum within the recess. rater thenl rises 'through thc inductionpassage R to lill the vacuum, but being met at point'm by the revolvingwings, is prevented from passing behind the wheel, and is carriedforward to the ednction passage lt', into andY through which it escapes.

The motion communicated to the water being sulli-v cient to create apartial or cnt-ire vacuum within the wheel, according to the speed atwhich it moves, no water can remain within it when in motion, except in-the part occupying that portion of the recess tin-ming the connectingpassage between the induction and eduction openings, and the distancebetween these openings being small compared with the entirecircmnference of the circle, and the stream being but slightly deflectedfrom a straight course in its passage through the pump, a saving ofpower result-s, which, in other free-joint pumps, is consumed either incarrying water around an entire circle or through passages havingvarious deflections, angles, alnl curves, which are avoided in thisinvention.

Having described my invention,

1. free-joint rotary pump for conveying water or other fluid, by impetuscommunicated by rapid mot-ion, when said pump is constructed with a casehaving an annular recess of like diameter at both ends, within which thepropelling-wheel revolves or makes an` entire sweep, free from contact,and said case having induetion and cduction passages comn'iunicatingwith said recess through openings in its periphery, the centers of whichopenings are in the plane of motion of the center of thepropelling-wheel, substantially as speci-v yfled.

2. In combination with thc case A, its annular' rccess 1), and inductionand cduction passages, as described, the propelling wheel G, made. np ofradial wings, arranged to project from a central hub, and

supported by a central flange, for operation within the recess,essentially as spccilied.

3. The combination of the movable or adjustable head D andybearilig-boxes F and H, substantially as and for the purpose herein setforth.

4. lhe bearing-box H having a .curved base, K, and ina-dc adjustable inrelation to the curved arm Ur, in combimition with the shaft I having agrooved or ridged tit within said box, essentially as described.

5. The l'combination of the boss or ring N on'the case A, and concentricwith the shaft I of' the pump, with the annular or recessed standard L,for varying the position ofthe pump, substantially as specified.

' WM.. D. ANDREWS.

Witnesses:

lnnn. HAYNns, R. E. Ramsau.

